The brief
The client needed two replicas — a tank and a fighter jet — for the same project. Military hardware is unforgiving to inflate. Straight edges, hard corners and flat panels are the opposite of what air pressure wants to do, and a proportion that is slightly off reads immediately as a cheap copy rather than a representation.
They asked for approval on renders rather than on a finished piece. For two objects at this level of detail that is the right way round: correcting a silhouette on screen costs nothing, and correcting it after welding costs the build. It also meant the client could compare the pair side by side before either existed in fabric.
The second requirement was that both pieces came from one supplier. A tank and a jet from two different workshops never quite match — the palette drifts, the surface finish differs, and the two objects stop reading as a set. Since they were going to be shown together, they had to be designed together.
Design
Both vehicles were modelled in 3D from reference material and rendered from the angles the client would actually see them from, rather than from the angles that flatter a model. Details that read at distance came first: turret proportions, the jet's intake shape, wheel and undercarriage placement. Panel lines that would only be legible up close were simplified rather than printed in.
The renders went back and forth twice. On the jet the nose was lengthened and the canopy line adjusted; on the tank the turret was widened so the silhouette would still read from the side. Both changes were made and re-rendered before any material was ordered. That is the whole point of the stage: a silhouette argument is easy to have on screen and impossible to have after the fact.
We also worked the two vehicles against each other. The jet is a long horizontal shape with a small frontal area; the tank is compact and boxy. Placed together, the pairing reads best if the jet is clearly the longer of the two, so the tank was kept tight rather than stretched to match.
Approved from 3D renders before cutting · Internal baffles hold the flat panels
Build
Flat surfaces are the hard part of an inflatable replica, and internal baffles do that work. They are sewn across the inside of the tank's hull and the jet's fuselage to hold those panels flat instead of letting them bow outward under pressure. The bowing is what normally gives an inflatable away, whatever its silhouette.
Everything is printed PVC-coated fabric, which lets the markings and colour breaks come out as print rather than appliqué. No raised edges, and no colour mismatch between adjacent panels — which on a finish that changes colour across a seam is impossible to avoid with applied pieces.
Each piece carries its own blower and its own anchoring. The tank sits on its own hull base with loops for weights; the jet is light enough that the undercarriage legs and a small number of tie-downs hold it. Neither piece needs a frame or a rigging point, which is what keeps them installable by the same two people who handle everything else on site.
Test inflation
Both pieces were test-inflated in the factory and photographed before packing. On a hard-edged replica the test has one job above all others: confirming that the flat panels actually stay flat at working pressure. Baffles that are correct on the bench can still let a panel lift at the corner once the figure is full.
It also confirms the join between the printed panels. Where a colour break crosses a seam, any misregistration shows up the moment the piece is inflated and viewed from the side — and the side is the angle a replica is always photographed from.
Installation
Each piece runs on its own blower, so the two inflate independently and can be placed separately. That matters when a client is laying the pair out in a space they have not seen them in yet, and needs to move one without disturbing the other.
The tank is the heavier of the two to position, because the base has to be right before the hull goes up. The jet goes up quickly and is then walked into place. Both come down in the reverse order, and both pack into bags rather than crates.
Neither piece needs to be staked or framed, which matters on the kind of site these events are usually held on — hard standing, no permission to drill, and a schedule that does not allow for groundworks.
Result
Both pieces shipped to Belgium in one consignment, inside the 15 working days the client had allowed. Because the shapes had been signed off as renders, there was no stage at which the client was asked to imagine what the finished object would look like.
They were also photographed together at test inflation, in the same light and against the same background, which is the only clean way to check that a pair actually matches.
The render-first process is now how we handle any replica with straight edges or mechanical detail. It moves the disagreement to the point where a change is cheap, which is the only place it is worth having.
What we took from it
The lesson is that the hard part of a replica is not detail, it is flatness. Clients describe what they want in terms of markings and proportions, but what makes a replica read as a replica is whether the large surfaces stay planar under pressure. Everything else follows from that.
The other point is about pairs. Two objects built as one job share a palette, a surface finish and a set of proportions; two objects built as two jobs share a delivery date and nothing else. On any multi-piece brief we now design the relationship between the pieces, not just each piece.
